Given $\displaystyle \pi: \begin{cases}l_1: \frac{x-2}{4}\ = \frac{y-1}{2}\ = \frac{z+5}{-4} &\\l_2: \frac{x+4}{-2}\ = \frac{y+1}{0}\ = \frac{z}{1} & \end{cases}$ and the point $\displaystyle M=(1,2,3)$ outside the plane.Find the projection of the line $\displaystyle M_1P$ on plane $\displaystyle \pi$ where $\displaystyle P$ is the intersection point of lines $\displaystyle l_1, l_2$.

All I can do is that I can find the equation of plane $\displaystyle \pi$ but don't have any idea what to do next.

I need your help.

Thank you.